1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44870a8f5f63e9cd2f3e1ef8f6560912ae7a4f21392045f46b1829f179099eff. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc42800e-cb2f-44ae-adf1-d8e22e39fa78.json and https://artists.proofprofile.net/proofs/artist/bc42800e-cb2f-44ae-adf1-d8e22e39fa78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dff5ab95f46a03ee83d22d74d84ebdca1ebd3258e09962aca2bae2a0331496. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMZ2205290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7aa24251f4c1d1f64fac1cfb1593891183341f479b661b7190dc46c1fa7e91. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMY2444153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a64ede24422d0ccb2960c43d2a224e48fd51e8f1ef91468c5616669b23bf20c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2531085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40101ae9d3bc2e41f878e462a65e4aa60b9d01d75aa31eaa59025e69bacccd5f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2531086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0089db698d9f7ec6250bff94ec4ae1c446e65b1a16bf0acb465aeb98f26418e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2531087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a8a5ed6f651f63f4a13b9d5398011ce3bc81b431e9fc34ef94d0af6bc39549. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2531088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18339d7dd7a9282c0ce355702c53929903970a50b6865a28bb7b6aaf917d8df. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2531089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558898727c0654d9a7d3c6cb6e2f7abca9a85397c29bf2cc5d150fabca438b08. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2531090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee600bbe6e295951f54a78a6c77107ae530e9dffc0c714ba1202f722b486ca7. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2531091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e9d54d3464c71c8f777231f9e8d42b0b958d271706e6e22dfcaa0f22f36800. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2531092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89977617dc9124bb05035b7ad0d01af30158a28a4a3c8019b743381118bea825. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2531093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3982eef7e53ee4b96aa76a5762442e819ab42d074f7d0aa2ddbffe7b94c8327. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNMT2531094.